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In a tube chassis car (w/ full cage certified to 8.50et ) with a thick alum front plate, a .090 steel midplate is it advisable to use a solid trans mount like the Moroso piece, is a polyurethane mount ok, or as TCI stresses in their catalog ... "never use a solid trans mount".
Engine will be a BB Chevy mated to a TH400 trans w/a brake.
 

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NEVER, EVER!! Some may get away with one, just not worth breaking cases to try. Poly or rubber will work for you.
 

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Yeah I always wondered if the companies that make the solid mounts are sponsored by a conglomerate of trans housing manufacturers:rolleyes:
 

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.

We've had this exact thread several times, and very recently. Some of us use the solid mount as the engine limiter.
Mine is a tube chassis, but not certed to 8.50 (I'm 6.00) Been using solid mount since '94, and been pretty quick with zero breakage.
It's been some like, some don't. Good luck.


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Ran tube chassis Beretta for 12 years and car was run much before that. Front/rear plates and solid trans mount that was removable. Held in place by two quick pins. Never a broken glide tailshaft housing.

The key thing is that if the chassis is not gusseted properly with diagonals and it twists, this is what mostly will break transmissions housings/cases. If your car has any chassis twist to it, install a polyeurethane mount.
 
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